Model results

partial residual plots

outliers & influential data points

https://www.oreilly.com/library/view/practical-statistics-for/9781491952955/ch04.html#InfluenceExample

https://online.stat.psu.edu/stat462/node/172/

standardized residuals, "number of standard errors away from regression line" (normalized so SD = 1)

quantify how large the residuals are in standard deviation units

residual = (obs - preds)

abs(std resid) > 3 is sometimes a threshold for outlier detection

first, very positive residuals (underestimate of y, or, more people want to relocate from A to B than expected)

and the very negative residuals (overestimate of y)